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We narrowed to 949 results for: ache

Showing: 321 - 340 of 949 results

  1. CRISPR 101: Cytosine Transversion Editors

    Type
    Blog Post
    ...huge innovation, there was a limitation to this approach. CBEs and ABEs are base transition editors. They...were included in the CGBE. They also developed a machine learning model capable of predicting editing outcomes...GBEs), Xueli Zhang’s lab, returned with a unique approach to improving C → G editing. Instead of fusing ...abasic site. In this post, it refers to the same approach as a CGBE. BER Base Excision Repair A cellular... CRISPRi screens, target-library analysis, and machine learning. Nature Biotechnology, 39(11), 1414–1425...with sequence context preference predictable by machine learning methods. Nature Communications, 12(1),...

  2. How to Deposit Your Plasmids with Addgene

    Type
    Blog Post
    ... to make it easy for you to share plasmids. To achieve this goal, we will archive any plasmids you've ...article page, enter the name, type, and description of each plasmid associated with this deposit as explained...separate promoters, tags, or cloning information for each insert.  Encodes gRNA/shRNA A plasmid with one... plasmid has multiple inserts, enter details for each insert individually.   Figure 9: Add cloning information...information for your first plasmid and can be used on each individual page (Gene and Insert, Cloning Information...The "Copy" button is located near the top right of each data entry page. Once you have completed the data...

  3. Luminescent Imaging with Nano-lanterns

    Type
    Blog Post
    ...can be affected by both autofluorescence and photobleaching. Researchers have long been interested in using... cells. As Nano-lanterns are not subject to photobleaching/phototoxicity, they successfully imaged multiple...applications. For long-term imaging, especially where photobleaching and phototoxicity are a concern, these constructs...constructs come in very handy. This approach is especially suited to complement optogenetic tools, where...of various Nano-lanterns, but it does not isolate each Nano-lantern, so Takai et al. used a linear unmixing...

  4. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    ...instead use a preexisting, conserved cellular machinery to process gRNAs. Hijacking tRNA processing to...plants. Yang was intrigued by the tRNA processing machinery present in almost every living organism. Precursor...targeting 4 MAPK genes, again using rice protoplasts. Each pair of gRNAs targeted genomic sites separated by... them to examine the frequency of both indels at each locus, as well as large deletions. They detected...promoter and terminator need be encoded only once, and each <200 bp tRNA-gRNA takes up half the space of a standard...

  5. Pooled CRISPR Libraries Offer Genome-Wide Control for Large-Scale Functional Screens

    Type
    Blog Post
    ...activate all 20,000 genes, it is not possible to test each one and make sure it’s working. You can only do ... Those two things, in my opinion, had not been achieved.” That is, until now. Enter the SAM pooled library...uses the sunCas9 system and contains 10 sgRNAs for each transcription start site in 15,977 human genes. ...repressor (CRISPRi) library contains 10 sgRNAs for each transcription start site in those 15,977 human genes...demonstrated in a paper in Cell that they could typically achieve 90-99% knockdown with minimal off-target effects...

  6. Hot Plasmids December 2018 - C. elegans RNAi, TurboID, Detecting Viral Outbreaks, and Protein Binding Specificity Tools

    Type
    Blog Post
    ...research to study gene function. RNAi is commonly achieved by feeding E. coli expressing dsRNA to C. elegans...between two inverted T7 promoters. Transcription from each promoter progresses past the specific gene producing...TurboID and miniTurbo podcast segment A fundamental approach to studying membranes, organelles, and other subcellular...podcast segment As the primary cause for both the stomach flu and food-borne illnesses, noroviruses can infect...enriched with synbodies--or synthetic antibodies--attached to magnetic beads, allowing the virus to be easily...

  7. Antibodies 101: Isotypes

    Type
    Blog Post
    ...refresher). There are five antibody isotypes that each have a unique heavy-chain constant region: IgM, ...not all isotypes have the same ability to activate each of these functions: Recruitment of immune cells...Transportation of antibodies to places they can’t reach on their own. The antibody’s heavy-chain constant...numbered, i.e. IgG1, IgG2, etc. Let’s dive in and meet each of the isotypes. IgM This isotype is produced during...expressing IgM. IgM has a pentamer structure, which means each IgM molecule has a binding capacity or valency of...

  8. Behind the scenes: Addgene’s new search engine and more

    Type
    Blog Post
    ...members from the Customer Service, Data Curation, Outreach, Product, Scientist, and Software teams. We knew... with an intuitive user interface.   The team approached the issue from multiple angles: the overall user...of information so we were able to fine tune our approach much more than if we were dealing with general...the strategies we used in our software design. In each case, we leveraged the team’s knowledge of the scientific...catalog, educational resources, and depositors — each with subcategories such as plasmids and viral preps...

  9. REPLACR Mutagenesis: Replacing In Vitro Recombination Methods

    Type
    Blog Post
    ...recombineering, bacteria express phage recombination machinery, which facilitates easy genetic modification by...methods. As described above, you design two primers, each containing the desired mutations, to amplify both...mutations, the primers also have some homology to each other; ~17 bases is optimal. After being treated...electrocompetent cells in which the phage recombination machinery is induced using L-arabinose. These cells can ...mutation-containing colonies/total colonies) is about 84% for each of the three methods. However, REPLACR-mutagenesis...

  10. Addgene: The First Twenty Years

    Type
    Blog Post
    ...came on March 9, 2005. It took almost six years to reach our first major repository milestone — 10,000 plasmids...did this the old-fashioned way: through physical outreach, visiting organizations, knocking on doors, and...approvals. In 2013 we were thrilled to receive the Massachusetts Nonprofit Network Excellence Award for our electronic...   Expanding our work In March 2015, Addgene reached the 500,000 plasmids distributed milestone! We ... Rachel Leeson...

  11. Antibodies 101: Polyclonal Antibodies

    Type
    Blog Post
    ... tested following each immunization until the desired level of antibodies is reached - typically within...immune system, antibodies are produced by B cells. Each individual B cell produces antibodies that all recognize...proteins pass through. However, protein A and protein G each have different affinities for IgG subtypes from ...experiments that require multiple antibodies that each detect a different antigen. To pre-adsorb the antibodies...

  12. Transferable Skills Guide: Public Speaking

    Type
    Blog Post
    ...Cell paper. With six figures. Averaging ten panels each. (For this story, it is important to know that the...to this paper and/or biology in general until I reached Fig. 6, Panel L, and hope nobody noticed that none...wrong, ask yourself, “What next step will help me achieve my purpose? Should I go over this slide again? ...the presentation, at which point you will have achieved your goal. Yay!   You’re only human When it comes... Rachel Leeson...

  13. All in a Twist: dsRNA

    Type
    Blog Post
    ...foreign dsRNA activates the innate immune response machinery of the host. This pathway has been clinically... response is activated if and when dsRNA levels reach a given threshold within the cell, as is often the...viral infection. Endogenously produced dsRNA rarely reach this threshold and thus do not typically activate...and H2) handle most of these intermediates, with each one acting on specific substrates and in distinct...cycles. When RNA:DNA hybrids levels are allowed to reach very high or low levels, possibly due to dysregulation...

  14. 7 Simple Strategies to Resolve Conflicts with Difficult Supervisors

    Type
    Blog Post
    ...supervisor, or do you have to work with difficult people? Each time I ask this question at my workshops, I get ...trouble making decisions. In my work as a thesis coach for graduate students, I heard about supervisors...work hours. While specific strategies to deal with each of these personality types is beyond the scope of...and if you cannot resolve a problem on your own, reach out for help so you can get the support you need...Find plasmids to Expedite Your Experiments and Achieve Your Research Goals    ...

  15. Design Tips for Prime Editing

    Type
    Blog Post
    ...When possible, the PE3b/PE5b approach is recommended over the PE3/PE5 approach. Figure 7: Nicking...with BioRender.com. PE3b and PE5b: In this approach, the nicking sgRNA is designed to bind only after...BioRender.com. MMR inhibitors PE4 and PE5: These approaches inhibit MMR to improve editing efficiency, but...BioRender.com. That’s all our tips for today! Each tip includes a citation to the paper it was drawn...

  16. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

    Type
    Blog Post
    ...insertions or deletions in the DNA sequence. This same approach is effective to target short ncRNAs, such as microRNAs...A schematic illustration of CRISPR/Cas9-based approaches to study ncRNAs. (A) Transcription start site... sgRNA to temporarily block the transcription machinery of a target gene or DNA that codes for ncRNA. ...to enhance or upregulate ncRNA expression. This approach is useful for lncRNAs because they regulate nearby...science.1225829  Hazan J, Bester AC. CRISPR-Based Approaches for the High-Throughput Characterization of Long...

  17. Open Resources and Plasmid Tools For Studying C. elegans

    Type
    Blog Post
    ...Scientists are currently doing this using two approaches: single-cell RNA-sequencing to identify neuronal...neuronal class and deep sequencing of neurons from each class to fully characterize the transcriptome. The... 2019. For more information about the aims and approach of CeNGEN, check out their publication.   3’UTRome... this tool by splitting cGAL4 in two and binding each half to a gp41-1-N-intein. Split inteins are protein...for the creation of CRISPR targeting vectors that each contains a guide RNA and repair template of your...

  18. Antibodies 101: ELISA (Enzyme-linked Immunosorbent Assay)

    Type
    Blog Post
    ... the target protein, so they do not compete with each other. This antibody is also conjugated to another...reflects the concentration of your target protein in each well. The reaction is stopped by the addition of...reaction, turns the solution yellow. The absorbance of each well, which is measured using a microplate reader..., so if you max out your standard curve and it reaches an asymptote, you won’t be able to accurately calculate...portion or the OD of your experimental samples has reached 4.0, you can resolve this issue when you repeat...

  19. High Complexity Golden Gate Assembly with NEB’s DAD

    Type
    Blog Post
    ...thought otherwise! They suspected a data-driven approach might allow for an increase in the complexity....to sets of up to 6-8 overhangs, the data-driven approach was needed to massively expand complexity. The...search window for a site—or sites—that must be used. Each of the tools works with either 3-base or 4-base ... 10-piece circular assembly, with the 52-piece approach yielding approximately ~800-fold fewer plaques...  Rachel Leeson...

  20. Antibodies 101: Choosing the Right Isotype

    Type
    Blog Post
    ...that are easily distinguishable from each other. In a direct approach, that is simple - but what about when...a mix of different isotypes and subclasses. They each have their own advantages. Since monoclonal antibodies...use an indirect (primary and secondary antibody) approach?  Staining for multiple targets When staining ...plan primary/secondary antibody pairing such that each target has a unique species or isotype that can ...
Showing: 321 - 340 of 949 results